I rigged a human model with Inversed Kinematics but it is not working. How can I debug this?
Just unparent the IK control in Edit mode. Now it will work.

Change the LowerLeg pole angle to 0. Your pole is inversed like a chicken leg.

In Edit Mode select the foot and uncheck Inherit Rotation. This will make the foot return to the right position.



Just in case an animated gif: